How can i initialize the moment, when item collises fire block.

[Trahatron3000]

I want to make unusual recipe for item, when some item is on fire block, some item should appear.

[Trahatron3000]

just some item, that lies on the ground

[MFMods]

if you make your own ItemEntity, you can control how it behaves when it takes fire damage - cancel the damage and do your recipe thing...

so, how do we make an instance of ItemEntity for an item being dropped or otherwise created in world? depends.

if it's your item, just override createEntity and you're done. parameter defaultEntity is an entity that would normally be created - get position from it, maybe movement too (DeltaMovement).

if it's not your item you need to use an event to make your own ItemEntity.

 

it's not too difficult. but it will conflict with other mods doing the same thing. for example mods that make items lie flat on the ground, etc... those stupid mods will rudely break your mod's functionality, but for start just document that as incompatibility and move on.